Strength Evaluation of Clay Soil Using Fly Ash and Lime
Mirhamza Noorzai1, Amanpreet Tangri2

1Mirhamza Noorzai, Department of Civil Engineering, Chandigarh University, (Punjab), India.
2Amanpreet Tangri, Department of Civil Engineering, Chandigarh University, (Punjab), India,

Manuscript received on 01 May 2019 | Revised Manuscript received on 15 May 2019 | Manuscript published on 30 May 2019 | PP: 2822-2827 | Volume-8 Issue-7, May 2019 | Retrieval Number: G5680058719/19©BEIESP
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Abstract: one of the possible problems that could appear in execution projects like highway construction, mass construction, industrial and residential building construction is low strength of underneath soil. Many methods have been used to stabilize such soil but are in high demand. In this research paper lime used as modifier and binder, and fly ash, which is a by-product producing in millions of tons every year and responsible for environmental contamination is used as clay soil stabilizers. initially, several laboratory experimental tests were conducted on clay soil with various percentages of lime (0%, 2%, 4%, 6%, 8%, and 10%) by weight. the results indicate that the addition of 7% of lime gives optimum results and increase the strength of soil up to twice. in the second round of investigation, many specimens were prepared with addition of 7% lime and various percentages of fly ash (4%, 8%, 12%, 16%, and 20%) by weight on the wet side (+2% of OMC), dry side (-2% OF OMC) and optimum water content. soil specimen were tested after (7, 14, and 28) days of curing. the results indicate that, as fly ash content increasing, the unconfined compressive strength (UCS) of soil increases till an optimum point (180 Kpa) which shows around (4) times increment. time of curing has considerable impacts on soil strength. the 28 days curing brought 44.5% improvement in the UCS of clay soil. addition of fly ash and lime make the soil more durable, after 12 wetting-drying cycles, the soil still indicates 98kpa compression strength which is 48% more than untreated soil strength.
Keyword: Clay Soil, Lime, Fly Ash, Unconfined Compressive Strength.
Scope of the Article: Soil-Structure Interaction